The anticipated outcome is a nanofabrication technique that can be used to reliably pattern nanostructures in three dimensions and in bulk. A resolution of 100 nm would allow us to fabricate metamaterials for the long end of the optical spectrum, the near-infrared, and beyond. The method can be used for prototyping because arbitrary structures, as long as they are self-supporting or in a solid matrix, can be created through computer control. Femtosecond-laser fabrication offers an avenue for patterning metal nanostructures on a larger scale than currently possible. It could be used for many applications beyond metamaterials, including optoelectronics, electronics and biology due to its flexibility.